Swelling modulated polymeric drug delivery device
US5120548A · kind A · utility
693Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1989 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Nov 7, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2866
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A controlled release drug delivery device, comprised of swellable polymers, whose degree of swelling in an environment of use is controlled by swelling modulators blended within the polymers, is disclosed. The swelling modulators can include buffers, osmagents, surfactants or combinations thereof surrounded by a microporous coating or interspersed within individual matrices. The combination of controlled release swelling modulators with swellable polymers may be applied to regulate patterns of beneficial agent (typically a drug) release.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.